Android——获取手机应用图标

 1 package com.example.utils;
 2 
 3 import java.io.File;
 4 import java.io.FileOutputStream;
 5 import java.util.List;
 6 
 7 import android.app.Activity;
 8 import android.content.pm.PackageInfo;
 9 import android.graphics.Bitmap;
10 import android.graphics.Canvas;
11 import android.graphics.PixelFormat;
12 import android.graphics.drawable.Drawable;
13 import android.os.Bundle;
14 
15 public class MainActivity extends Activity {
16 
17     @Override
18     protected void onCreate(Bundle savedInstanceState) {
19         super.onCreate(savedInstanceState);
20         setContentView(R.layout.activity_main);
21 
22         // 获取PackageInfo
23         List<PackageInfo> packages = getPackageManager().getInstalledPackages(0);
24 
25         // 获取需要的信息并存储(当然这里可以用增强for循环)
26         for (int i = 0; i < packages.size(); i++) {
27             PackageInfo packageInfo = packages.get(i);
28             String appName = packageInfo.applicationInfo.loadLabel(getPackageManager()).toString();
29             Drawable appIcon = packageInfo.applicationInfo.loadIcon(getPackageManager());
30 
31             // 将drawable转成Bitmap对象
32             Bitmap bm = drawableToBitmap(appIcon);
33 
34             // 指定存储路径以及存储文件名格式
35             File dir = new File("/sdcard/Pictures/");
36             File outputImg = new File(dir, appName + ".jpg");
37             
38             // Bitmap存储过程
39             try {
40                 FileOutputStream out = new FileOutputStream(outputImg);
41                 bm.compress(Bitmap.CompressFormat.PNG, 90, out);
42                 out.flush();
43                 out.close();
44                 LogUtil.e("test", "已经保存" + i);
45             } catch (Exception e) {
46                 // 不处理异常了
47             }
48 
49         }
50     }
51 
52     /**
53      * 将Drawable转成Bitmap
54      * @param drawable
55      * @return
56      */
57     public Bitmap drawableToBitmap(Drawable drawable) {
58 
59         Bitmap bitmap = Bitmap.createBitmap(
60 
61         drawable.getIntrinsicWidth(),
62 
63         drawable.getIntrinsicHeight(),
64 
65         drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
66 
67         : Bitmap.Config.RGB_565);
68 
69         Canvas canvas = new Canvas(bitmap);
70 
71         // canvas.setBitmap(bitmap);
72 
73         drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),
74                 drawable.getIntrinsicHeight());
75 
76         drawable.draw(canvas);
77 
78         return bitmap;
79 
80     }
81 }

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />